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DIY Hobby projects, diagram, schematic

Electronic Circuits

DIY Hobby projects, diagram, schematic

Precision 1Hz clock generator circuit

electronicecircuits, August 13, 2018September 12, 2023
1hz clock generator

This is One Hertz (1Hz) clock generator circuit using 32.768Khz crystal, CD4060 and CD4013 ICs. Our circuit base on crystal oscillator. So we can get very accurate and stable output. That can use for clock, timers and many projects.

1hz clock generator circuit schematic
PARTS LIST
R110MΩ
R2330KΩ
C133pF Ceramic
C233pF Ceramic
C30.1µF Ceramic
IC1CD4060
IC2CD4013
XTAL32.768KHz

XTAL is 32.768KHz crystal. That is a very commonly use in digital clock.

CD4060 1Hz clock generator

R1 use as bias resistor and R2 use as a current limiting resistor. Also C1 and C2 are load capacitors.

CD4060 pinout
The CD4060 is a CMOS chip with a binary counter, divider and oscillator

Let’s check how we get 1Hz output.

We need to divide our crystal frequency by 215 to get 1Hz. Because CD4060 act as an oscillator and frequency divider. here it is arranged to divide by 16384 which gives 2Hz when you using 32.768KHz crystal.

32.768KHz/214=2Hz

Then we use CD4013 dual D-Type Flip-Flop as a frequency divider. But circuit use only one D-type flip-flop. It divides our frequency by 2. Now we can get 1Hz output. Other D-type flip flop is not used and it connects to the ground.

CD4013

This circuit accuracy slightly depends on crystal quality and ambient temperature. If you have a high accuracy frequency meter you can slightly adjust frequency by changing C2 capacitor valve and you can use 50pF variable capacitor for C2 to do that. You can connect a frequency counter to CD4060 number 9 pin (External C) and adjust C2 to read exactly 32.786KHz. This is not necessary for our normal projects.

Precision 1Hz clock generator circuit PCB design

Precision 1Hz clock generator circuit PCB Layout1Hz Oscillator Circuit PCB Copper Tracks with Drilling HolesCD4060 1 hertz crystal oscillator pcb Component Side

Please send your ideas, which are very important for our success…

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Comment

  1. Md Al Morad says:
    August 28, 2023 at 10:51 pm

    Hi, can u make it?
    Device Specs

    Frequency Range: 0.01 – 999Hz programmable

    Wave Form: Square pulses

    Duty Cycle: 50%

    Current Intensity: 20μA to 400μA

    Constant current generator

    Output Polarity: Programmable alternating, positive or negative

    Output Channels: Two fully independent channels

    Memory: Professional- holds up to 100 programmable protocols

    Reply

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